Water-gage for boilers.



no. 7l5,l33. Patented Dec. 2. I902.

A. PAINE.

WATER GAGE ro n BOILERS. (Application filed Mar. 10, 1902.)

(No Model.)

UITED STATES PATENT OFFICE.

ASA PAINE, OF MINNEAPOLIS, MINNESOTA.

WATER-GAGE FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 715,133, dated December 2, 1902.

Application filed March 10,1902. Serial No. 97,646. (No model.)

To aZZ 1072,0721, it may concern.-

Be it known that I, ASA PAINE, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvementsin ater-Gages for Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in means for indicating the height or level of the water in steam-boilers. V

The object of the invention is to provide simple and effective indicating mechanism which may be located at any convenient point either adjacent to or at a distance from the boiler and which will be operatedautomatically by the rise and fall of the water, thereby enabling the engineer to determine at a glance from a position as remote from the boiler as desired the height or level of the water contained in the boiler at any time.

The invention consists of certain features of construction, combination, and arrangements of parts, as will be hereinafter more fully described, and particularly defined in the appended claim, reference being had to the accompanying drawings, in which Figure l is a view in elevation of the invention in operative connection with a boiler, a portion of the latter appearing in vertical section. Fig. 2 is a detail sectional View through the float-chamber.

Referring now more particularly to the drawings, the numeral 1 represents a steamboiler of any of the forms in common use from which extend pipes 2 and 3, which connect the steam and water spaces of the boiler with the corresponding spaces of a float chamber or casing 4, which casing is designed to be supported upon the exterior of the boiler in any approved way.

Arranged within the chamber 4 is a hollow metal float 5, which is carried by a lever 6, pivotally mounted upon a shaft 7, so as to swing to allow the float to rise and fall with the water in said chamber. To one of the eXteriorly-projecting ends of this shaft is rigidly attached an arm 8, which communicates said gradnations thereon, forming the scale.

The pointer when in a neutral position registers with the mark or line of graduation at the center of the scale and indicates that the water in the boiler is at the normal level, and when at the limit of its up or down movements from said center line indicates that the water in the boiler has risen to the highwater level or fallen to the l0wwater level. The pointer is rigidly connected to a shaft 12, on which is a pinion 13, which meshes with a toothed sector 14, said sector being carried by a weighted lever 15, mounted to swing upon a pivot 16. As this lever swings upon its pivot in one direction or the other the sector 14 transfers motion to the pinion 13 and operates the pointer 11. Motion is communicated from the arm 8 to the lever 15 through the instrumentality of wires, rods, or other suitable connections 17 and 18,which connect the same with arms of two bell-crank levers 19 and 20, which arein turn connected by a similar connection 21.

The operation of the device is as follows: When the Water in the boiler is at the normal level, the parts are in the position shown in the drawings, from which it will be seen that the arm 8 and pointer 11 lie in a horizontal plane and the pointer registers with the grad nation at the center of the-scale. When the water in the boiler rises above the normal line, the float 5 is carried up and transmits motion to the pointer through the medium of the intermediate connections, whereby said pointer is caused to swing up to a correspond ing degree and to indicate the exact level to which the water has risen. On the other hand, when the water in the boiler falls below the normal level the float drops and the pointer is swung downward to indicate the degree or extent below the normal to which the water has fallen.

By the construction of the parts as herein shown and described the connections between the float-arm 8 and indicator 9 may be made of any length, so that the indicator may be either close to or at as great a distance from the boiler and float-casing as may be found most convenient or desirable, thus enabling the engineer to ascertain the state of the water in the boiler at a point in close proximity to his accustomed position, which may be remote from the boiler,without the necessity of proceeding each time to the boiler, as is necessary in order to determine the level of the Water from the ordinary gage.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operation, and advantages of the invention will be readily understood, and it will be seen that a simple, convenient, and elfective construction of indicator is provided.

Changes in the form, proportions, and minor details of construction may be resorted to without departing from the nature of the invention.

Having thus described the invention, what is claimed as new is- In a water-indicator for steam-boilers, the combination of the casing having connection with the boiler, a float arranged within the casing and operated by the change of level of the water therein, a lever exterior to the casing and connected for pivotal movement with the float-actuated lever, a graduated plate, a pointer cooperating with the graduations of the said plate, a pinion connected with the pointer, a toothed segment in mesh with the pinion, remotely-situated bell-crank levers, means connecting corresponding arms of the bell-crank levers, and independent connections between the'other arms of the respective bell-crank levers and the toothed segment and the lever exterior to the floatcasing, substantially as'specified.

In testimony whereof I affix my signature in presence of two witnesses.

ASA PAINE. [L. s] Witnesses:

O. B. KING, LESTER A. BOYCE. 

